<template>
	<div>
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>商品管理</el-breadcrumb-item>
			<el-breadcrumb-item>商品分类</el-breadcrumb-item>
		</el-breadcrumb>

		<el-card>
			<el-row>
				<el-col>
					<el-button @click="showAddCateDialog" type="primary">添加分类</el-button>
				</el-col>
			</el-row>

			<TreeTable class="treeTable" show-index index-text="#" border :expand-type="false" :selection-type="false"
				:data="cateList" :columns="columns">
				<template #isok="scope">
					<i style="color: lightgreen;" v-if="scope.row.cat_deleted === false" class="el-icon-success">
					</i>
					<i style="color: red;" v-else class="el-icon-error"></i>
				</template>
				<template #order="scope">
					<el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
					<el-tag size="mini" type="success" v-else-if="scope.row.cat_level === 1">二级</el-tag>
					<el-tag size="mini" type="warning" v-else>三级</el-tag>
				</template>
				<template #opt="scope">
					<el-button @click="showEditDialog(scope.row.cat_id)" size="mini" type="primary" icon="el-icon-edit">
						编辑</el-button>
					<el-button @click="removeCateById(scope.row.cat_id)" size="mini" type="danger"
						icon="el-icon-delete">删除</el-button>
				</template>
			</TreeTable>

			<el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange"
				:current-page="queryInfo.pagenum" :page-sizes="[2, 5, 10, 15]" :page-size="queryInfo.pagesize"
				layout="total, sizes, prev, pager, next, jumper" :total="total">
			</el-pagination>
		</el-card>

		<el-dialog @close="addCateDialogClosed" title="添加分类" :visible.sync="addCateDialogVisible" width="50%">
			<el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">
				<el-form-item label="分类名称" prop="cat_name">
					<el-input v-model="addCateForm.cat_name"></el-input>
				</el-form-item>
				<el-form-item label="父级分类">
					<el-cascader v-model="selectedKeys" :options="parentCateList" :props="cascaderProps"
						@change="parentCateChange" :change-on-select="true" clearable></el-cascader>
				</el-form-item>
			</el-form>

			<span slot="footer" class="dialog-footer">
				<el-button @click="addCateDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="addCate">确 定</el-button>
			</span>
		</el-dialog>

		<el-dialog title="编辑分类" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
			<el-form :model="editForm" ref="editFormRef" label-width="70px">
				<el-form-item label="分类名称" prop="cat_name">
					<el-input v-model="editForm.cat_name"></el-input>
				</el-form-item>
			</el-form>

			<span slot="footer" class="dialog-footer">
				<el-button @click="editDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="editCateInfo">确 定</el-button>
			</span>
		</el-dialog>

	</div>
</template>

<script>
	export default {
		data() {
			return {
				cateList: [],
				queryInfo: {
					type: 3,
					pagenum: 1,
					pagesize: 5
				},
				total: 0,
				columns: [{
					label: '分类名称',
					prop: 'cat_name'
				}, {
					label: '是否有效',
					type: 'template',
					template: 'isok'
				}, {
					label: '排序',
					type: 'template',
					template: 'order'
				}, {
					label: '操作',
					type: 'template',
					template: 'opt'
				}],
				addCateDialogVisible: false,
				addCateForm: {
					cat_pid: '0',
					cat_name: '',
					cat_level: '0'
				},
				addCateFormRules: {
					cat_name: [{
						required: true,
						message: '请输入分类名称',
						trigger: 'blur'
					}]
				},

				parentCateList: [],
				cascaderProps: {
					expandTrigger: 'hover',
					value: 'cat_id',
					label: 'cat_name',
					children: 'children'
				},
				selectedKeys: [],
				editForm: {},
				editDialogVisible: false,
			}
		},

		created() {
			this.getCateList()
		},

		methods: {
			async getCateList() {
				const {
					data: res
				} = await this.$request.get('categories', {
					params: this.queryInfo
				})

				if (res.meta.status !== 200) return this.$message.error("获取商品分类失败")
				this.cateList = res.data.result
				this.total = res.data.total
			},

			handleSizeChange(newSize) {
				this.queryInfo.pagesize = newSize
				this.getCateList()
			},

			handleCurrentChange(newPage) {
				this.queryInfo.pagenum = newPage
				this.getCateList()
			},

			showAddCateDialog() {
				this.getParentCateList()
				this.addCateDialogVisible = true
			},

			async getParentCateList() {
				const {
					data: res
				} = await this.$request.get("categories", {
					params: {
						type: 2
					}
				})

				if (res.meta.status !== 200) return this.$message.error("获取父级分类数据失败")
				this.parentCateList = res.data
			},

			parentCateChange() {
				if (this.selectedKeys.length > 0) {
					this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length - 1]
					this.addCateForm.cat_level = this.selectedKeys.length
					return
				} else {
					this.addCateForm.cat_pid = 0
					this.addCateForm.cat_level = 0
				}
			},

			addCate() {
				this.$refs.addCateFormRef.validate(async valid => {
					if (!valid) return

					const {
						data: res
					} = await this.$request.post("categories", this.addCateForm)
					if (res.meta.status !== 201) return this.$message.error("添加分类失败")
					this.$message.success("添加分类成功")
					this.getCateList()
					this.addCateDialogVisible = false
				})

			},

			addCateDialogClosed() {
				this.$refs.addCateFormRef.resetFields()
				this.selectedKeys = []
				this.addCateForm.cat_pid = 0
				this.addCateForm.cat_level = 0
			},

			editDialogClosed() {
				this.$refs.editFormRef.resetFields()
			},

			async editCateInfo() {
				const {
					data: res
				} = await this.$axios.put('categories/' + this.editForm.cat_id, {
					cat_name: this.editForm.cat_name
				})


				if (res.meta.status !== 200) return this.$message.error('修改失败')
				this.$message.success('修改成功')

				this.editDialogVisible = false
				this.getCateList()
			},

			async showEditDialog(id) {
				this.editDialogVisible = true

				const {
					data: res
				} = await this.$request.get('categories/' + id)

				if (res.meta.status !== 200) return this.$message.error('查询分类信息失败');
				this.editForm = res.data
			},

			async removeCateById(id) {
				const resConfirm = await this.$confirm('此操作将删除该分类, 是否继续?', '提示', {
					confirmButtonText: '确定',
					cancelButtonText: '取消',
					type: 'warning'
				}).catch(err => err)

				if (resConfirm !== 'confirm') {
					return this.$message.info('已取消删除')
				}

				const {
					data: res
				} = await this.$request.delete('categories/' + id)
				if (res.meta.status !== 200) return this.$message.error('删除分类失败')

				this.$message.success('删除分类成功')
				this.getCateList()
			},

		},
	}
</script>

<style lang="less" scoped>
	.treeTable {
		margin: 15px 0;
	}

	.el-cascader {
		width: 100%;
	}
</style>
